Abrams' law (also called Abrams' water-cement ratio law) is a concept in civil engineering. The law states the strength of a concrete mix is inversely related to the mass ratio of water to cement. As the water content increases, the strength of concrete decreases.
Abrams’ law is a special case of a general rule formulated empirically by Feret:
- S is the strength of concrete
- A and B are constants
- w/c is the water–cement ratio, which varies from 0.3 to 1.20
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- Abrams law, air and high water-to-cement ratios by ELSEVIER